Get whatever rear sight you want on your gun, and take it to a gunsmith. A gunsmith will have to mill out a sight cut into the slide so the sights can install. The type of cut the gunsmith will do depends on what sight you get.

Get whatever rear sight you want on your gun, and take it to a gunsmith. A gunsmith will have to mill out a sight cut into the slide so the sights can install. The type of cut the gunsmith will do depends on what sight you get.